MG Chemicals 60/40 Rosin Core Leaded Solder, 0.025" Diameter (23 Gauge), 1/2 lbs Spool (4894-227G)Weight: 227 g (0. 5 lb) Diameter: 0. 63 mm (0. 025 in) Gauge: 23 The MG Chemicals 4894 Sn60 Pb40 RA Solder Wire is electronics grade solder wire. The 60 40 rosin core solder uses a classic tin to lead alloy ratio complemented by a RA like flux core. This solder wire meets J STD 004B, ASTM B 32, and exceeds J STD 006C specifications. It melts at slightly higher temperatures and over a wider temperature range than 63 37 solder. This results in robust